Chain hoist



Oct. 2, 1928.

1,586,496 IS. H. NORTON CHAIN HOIST Filed Aug.`l5, 1925 2 Sheets-Sheet 1-11z Q w I gb L9 f xNvENToR wxTNEssES y Q'Vl/ AroRNEY Oct. Z, 1928.1,686,496

s. H. NORTON CHAIN HOIST Filed Aug.15, 1925 2 sheets-sheet 2 WITNESSIBPatented @et 2, i923. y y.:`

i .insane unirse sier-iis 'sAMUnLfni non-fron, or iiisnnvirrn,rnrinsvnvfinia; l

. CHALET lI-IQIS'I.

Application sied August i3, i325, semi no. 5o

An objectof the invention is the provision lof a device in which thepower is transmittedrto a sheave Afrom a driving shaft through a fiangedsleeve, an eccentric differential reduction gearing and adiscrintermediately disposed between the sleeve'and g said gearing7 thesleeve being mounted for the gearing. l Y Another` object of theinvention-is" the provision of a chain hoist in lwhich a iioatrotationiii a casing forming a housing for ing member. forms (the intermediaryfor.` the transmission. of power between a systenfi of reduction gearingand a power chain: wheel so that shocks to the gearing during stoppingand-reversing is obviated.

This invention will' be best understood from a consideration of thefollowing detailed description, in view'of the accom panyingdrawingsforming a part of thel specification;.nevertheless it is to beunderstood thatV the invention is not confined to the disclosure, beingsusceptible of such changes and modifications which shall define yno'material departure Yfrom the Vsalient features of the invention asexpressed in the appended claims.

In vthe drawings: y',

Figure 1 is a vertical longitudinal section'of a chain hoist constructedaccording to the principles of my invention(V Figure 2 is a view inperspective of the locking and releasing means for ,the hand wheel.' f

v Figurey 3 is a verticalsection taken along the line 3 3 ,of Figure 1.

Figure 4 is a perspective view of the di'r ferential mechanism forcontrolling the speed of the hoist. Referring more particularly to theldrawings ,it will be seen that the housing is composed of two sections10,1l'and a closure 12 bolted to 'section 10; Section 10 is cupshapedand forms a housing forthe1re `iluc` tion gearing ofthe hoist. A`rearwardly projecting flange 13 onhousing 10 contacts with section 11,and the flange 13 and section 11 are secured'together by'bolts 14.vSections and 11 as bolted together notonly form a partial housing 15 fora Aload chain wheel 16 but annular vflanges'l' provide abutmentsfir-*lateral bearings forten-I' tering said wheel inthe partial housing.Y

The upper endsof the sections yor pla-tes 10 and 11 ,have bearings 18itereceive the ends` of a pintle 19.r vThe pintlevisprovided with alperforatedlboss through which is Vinserted the threaded end ofasupportinghook 20. A nut 2l and a shoulder22` cooperate to locl the hookinrigidrelation with" the swingably cai'riedbysaid hook. o d

A shaft 28 has a reducedy portion -`mounted in a ball bearing` 24 at oneendr of. ther annu#A laiflange l17 of the section 11.'. Theopposite end25 of theshaft is seated in a ballbearvpintle so that-the combingdhousgsgagm ing 2G, .this end ofthe shaft beingfeccen` ,t

BO formed integrally with'thesleeve" and disposed adjacent the innerface 127` of seetion v10 4and within said-section lO.o fthe housing, .isprovided withdiametri-cally arranged axles 31 and 32 carrying rollers34v and 35 respectively. Rioller-34 is located iny a slot. 360i a,Hoating disc 37 whileroller 85 is received by a slot38. Thesefslotster-v minate at their inner ends adjacents cen-l ti'al opening 39 inthedisc but` which ifsl.'

eccentric relative v'totheshaft .'23 passing througlis'aid opening. Theinner face of the floating .disc 377 is provided with integrally formedplates 49 spanning the kslots 4U ,and v 41,'-thereby providing housingsfor fthe rollers 42 and 43. The outer faceofsaid ldisc also hasdiametrically disposed'and integral- ]yfforined plates 50lspanning,,slots'and v 38to provide housings for the rollers 34 andiVV35.'. The disc"BT-isprovided.with diamet-` rically `opposied slots(` 40and 41"which ref ceive respectively 'rollers 42 and 43 mounted` `on pins44. The pins project laterally freni van inner face of an eccentricygear ;h'av" ing shoulders 44'.l which space theroll'ers froinsaidgear. l

The gear has a hub section 46 in which is mountedthe ballbearing 26. Aball beai-, V i, ing 47 is mounted in a hub section 48 .on

the flange 30. vThe inner end of the ballk bearing 26 Ais spaced fromthe ball bearing 47 by a collar 23a formedintegrally with the .shaft 23.Y Y v Y The inner peripheral face of the housing 10 is provided with aring gear 51 in mesh Vwith the eccentric gear 15 and has approXiy.

mately four more teeth than the eccentric gear. Rotary motion istransmitted from a hand chain wheel 52 to shaft 23. The revolvingeccentric 48 causes the gear l5 to rotate but because said gear 'is inmesh with` the stationary ring gear 51 and has less teeth than the ringgear. gear l15 will travel around gear'51 but in the oppositedirection.ySince gear is connected to flange 30 by means of the oppositelyprojecting pairs of. rollers 34, 35 and ,42, 43 and the floating disc 37the sleeve 29' will be revolved', thereby rotating the load chain wheel16. Sleeve29 is conynected ton wheel 1,6 by a Woodruff key 53.

The eccentric passage 39 in the disc 37 and the elongated slots 36, 38a() and 41 permits thel floating disc to automatically readjust itsposition during rotationtowards or away in the ys'lots'36'and 38 ofthe'floating discj be revolved.

from the axis of the sha-ft and in cooperation with the rollers mounted.in theg slots provides for the elimination of strains in the drivingmechanism just described, in order to prevent strippingV the gearsduring a sudden reaction in the disposition of the load.

The operation of my device is as follows:

Vhen the hand chain wheel 52 is revolved A,in the usual manner, shaft-23is revolved causing an eccentric rotation of the gear 415' which, beingin mesh withthe gear 51, is caused to be rotated in a reverse directionVto the rotation of shaft 23. 'The rollers 42 and Y 4:3 engaging theslots 40 and 411, respectively rof' they floating disc 37, causes saiddisc to` This .disc in turn imparts rotary motion to the flange 30 bymeans of the rollers 3/1 and' 35 respectively operating 37, By reasonofthe .eccentric disposition of the floating disc` 37 with respect tothe shaft 23, said disc is adapted to oscillatevwhile being rotated andsince the flange 30 is connected with the sleeve 29 and the wheel v16 isconnected to said sleeve the handwh'eel'is likewise rotated'. i

'1n view ofthe fact that the gear 15 has VVapproximately' four teethYless than the gear A51, gear 15 will have a less speed of rota,-

tion'than shaft 23 so that the wheel 16 isv likewise rotated at a lessspeed than shaft 23 and hand wheel 52. The .purpose ofthe Vfloating disc37 is to provide a. means for transmitting the orbital motion of gear 15to sleeve 29 throughthe flange 30,V

rollers received by 1n erderto retain 'the load at any prede'- terminedheightv or to release and raise or lower the load 1 have provided awellknown form of mechanism for connecting the hand chain wheel52 to theshaft 23 at the reduced end 54 of said shaft.

The hand wheel is internally. threaded to engage the threaded sleeve 55on the friction The'friction disc is received within vdisc e a cupshaped member 57 having a flange 58 engaged between the handwheel and apacking 59.

The particular locking mechanism shown in Figure 1 and. connected withthe hand wheel"52 is afwell known formV of locking mechanism used inchain'pulleysj and need not bedescribed but in al general manner, Therotation of the'hand'wheel drives the shaft 23 .and upon release of theload the hand wheel'will be forced into clamping engagement with thedisc 56, and the ring.

a sleeve'on the shaft andprovided with ay diametrically disposediflange,a roller projecting laterallyifrom each endv of the flange, a floatingdisc'providedwith slots, a pair of theslots receiving the rollers, saiddisk being Vmounted eccentrically ofthe shaft, the rotatable gearhavingdiametrically disposed the remaining slots in the disk.. Y Y L l2.` A hoist comprising a housinghaving a fixed internal ring gear. afshaft mounted axially of the housing and provided with an eccentric gearin mesh with the ring gearY and rotatable on the eccentric of the shaft,

a sleeve on theshaft and provided with a diametrieally disposed flange,a rollerv projecting laterally from each end of the flange, a floatingdisk provided with slots, a pair of the slots receiving therollers, said `disk being mounted eccentrically Aof the shaft, therotatable gear having diametrically disposed rollers received by theremaining slots in the disk, a plate spanning"each slot and connected atthe ends thereof'to the disk and forming pockets for housing therollers, a

pair cach of the plates being located on anv .A oppesite face of thedisk.

1n testimony whereof I affix my signature.

SAMUEL H. NORTON.

